Riverstone Files NI 43-101 PEA Technical Report on Karma Gold Project

VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 09/17/12 -- Riverstone Resources Inc. (TSX VENTURE: RVS)(OTCQX: RVREF)(FRANKFURT: 3RV) ("Riverstone" or the "Company") is pleased to announce that it has today filed via SEDAR a NI 43-101 compliant Technical Report titled, Preliminary Economic Assessment Report for the Karma Project, Burkina Faso, West Africa, dated effective August 2, 2012 (the "Technical Report"), to support the Preliminary Economic Assessment results announced August 20, 2012 on the Company's flagship Karma Gold Project in Burkina Faso, West Africa. The Technical Report is authored by independent Qualified Persons and is available under the Company's profile at www.sedar.com.

Riverstone is active in Burkina Faso, West Africa, where it holds a portfolio of four high quality exploration projects covering in excess of 2,000 square kilometres. Additional information about the Company and its activities may be found on the Company's website at www.riverstoneresources.com and under the Company's profile at www.sedar.com.

ON BEHALF OF THE BOARD

Dwayne L. Melrose, President & CEO

Paul G. Anderson, M.Sc., P. Geo., the Company's Vice-President, Exploration, is the Company's Qualified Person for the purposes of National Instrument 43-101 and has reviewed and approved the technical contents of this release.

Certain statements made and information contained in this news release and elsewhere constitutes "forward-looking information" within the meaning of Canadian securities legislation. Forward-looking statements are based on certain assumptions and are subject to risks and uncertainties which could cause actual events or results to differ from those reflected in the forward-looking statements, including, without limitation, with respect to statements regarding the updated resources estimate, the assumptions set forth in this news release and in the Company's news release of January 9, 2012, August 20, 2012 and risks and uncertainties relating to the interpretation of drill results and the estimation of mineral resources, the geology, grade and continuity of mineral deposits, the possibility that future exploration, development results will not be consistent with the Company's expectations, accidents, equipment breakdowns, risk of undiscovered, title defects and surface access, labour disputes, the potential for delays in exploration and permitting activities, the potential for unexpected costs and expenses, commodity price fluctuations, currency fluctuations, political risk and other risks and uncertainties, including those described under Risk Factors in each management discussion and analysis and in the Company's annual information form which are available under the Company's profile at www.sedar.com. Forward-looking information is based on various assumptions including, without limitation, the expectations and beliefs of management, the assumed long term price of gold, that the Company will receive required permits and access to surface rights, that the Company can access financing, appropriate equipment and sufficient labour and that the political environment within Burkina Faso will continue to support the development of environmentally safe mining projects. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements. Accordingly, readers are advised not to place undue reliance on forward-looking statements.

This news release may use the terms "measured", "indicated" and "inferred" as these terms are defined under Canada's National Instrument 43.101. U.S. Investors are advised that, while such terms are recognized and required by Canadian regulations, they are not recognized by the United States Securities and Exchange Commission ("SEC") and may not be comparable to similar information for United States mining or exploration companies. As such, certain information contained on this news release concerning descriptions of mineralization and resources under Canadian standards is not comparable to similar information made public by United States companies subject to the reporting and disclosure requirements of the SEC. U.S. investors are cautioned not to assume that any part or all of the mineral deposits described in these categories will ever be converted into proven or probable reserves, as defined in the SEC's Industry Guide No. 7.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Contacts:

Riverstone Resources Inc. - Vancouver Office

Dwayne L. Melrose

604-801-5020


Riverstone Resources Inc.

Don Mosher

Corporate Development

604-685-6465


Riverstone Resources Inc.

Raju Wani

Investor Relations

403-240-0555


Riverstone Resources Inc.

Ron Cooper

Investor Relations

604-986-0112
info@riverstoneresources.com
www.riverstoneresources.com